/*
Copyright 2018 Michael Telatynski <7t3chguy@gmail.com>
Copyright 2015 - 2021 The Matrix.org Foundation C.I.C.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

import React from "react";
import { Direction, ConnectionError, MatrixError, HTTPError } from "matrix-js-sdk/src/matrix";
import { logger } from "matrix-js-sdk/src/logger";
import { capitalize } from "lodash";

import { _t, getUserLanguage } from "../../../languageHandler";
import { formatFullDateNoDay, formatFullDateNoTime, getDaysArray } from "../../../DateUtils";
import { MatrixClientPeg } from "../../../MatrixClientPeg";
import dispatcher from "../../../dispatcher/dispatcher";
import { Action } from "../../../dispatcher/actions";
import SettingsStore from "../../../settings/SettingsStore";
import { UIFeature } from "../../../settings/UIFeature";
import Modal from "../../../Modal";
import ErrorDialog from "../dialogs/ErrorDialog";
import BugReportDialog from "../dialogs/BugReportDialog";
import AccessibleButton, { ButtonEvent } from "../elements/AccessibleButton";
import { contextMenuBelow } from "../rooms/RoomTile";
import { ContextMenuTooltipButton } from "../../structures/ContextMenu";
import IconizedContextMenu, {
    IconizedContextMenuOption,
    IconizedContextMenuOptionList,
} from "../context_menus/IconizedContextMenu";
import JumpToDatePicker from "./JumpToDatePicker";
import { ViewRoomPayload } from "../../../dispatcher/payloads/ViewRoomPayload";
import { SdkContextClass } from "../../../contexts/SDKContext";
import TimelineSeparator from "./TimelineSeparator";

interface IProps {
    roomId: string;
    ts: number;
    forExport?: boolean;
}

interface IState {
    contextMenuPosition?: DOMRect;
    jumpToDateEnabled: boolean;
}

/**
 * Timeline separator component to render within a MessagePanel bearing the date of the ts given
 *
 * Has additional jump to date functionality when labs flag is enabled
 */
export default class DateSeparator extends React.Component<IProps, IState> {
    private settingWatcherRef?: string;

    public constructor(props: IProps) {
        super(props);
        this.state = {
            jumpToDateEnabled: SettingsStore.getValue("feature_jump_to_date"),
        };

        // We're using a watcher so the date headers in the timeline are updated
        // when the lab setting is toggled.
        this.settingWatcherRef = SettingsStore.watchSetting(
            "feature_jump_to_date",
            null,
            (settingName, roomId, level, newValAtLevel, newVal) => {
                this.setState({ jumpToDateEnabled: newVal });
            },
        );
    }

    public componentWillUnmount(): void {
        if (this.settingWatcherRef) SettingsStore.unwatchSetting(this.settingWatcherRef);
    }

    private onContextMenuOpenClick = (e: ButtonEvent): void => {
        e.preventDefault();
        e.stopPropagation();
        const target = e.target as HTMLButtonElement;
        this.setState({ contextMenuPosition: target.getBoundingClientRect() });
    };

    private onContextMenuCloseClick = (): void => {
        this.closeMenu();
    };

    private closeMenu = (): void => {
        this.setState({
            contextMenuPosition: undefined,
        });
    };

    private get relativeTimeFormat(): Intl.RelativeTimeFormat {
        return new Intl.RelativeTimeFormat(getUserLanguage(), { style: "long", numeric: "auto" });
    }

    private getLabel(): string {
        const date = new Date(this.props.ts);
        const disableRelativeTimestamps = !SettingsStore.getValue(UIFeature.TimelineEnableRelativeDates);

        // During the time the archive is being viewed, a specific day might not make sense, so we return the full date
        if (this.props.forExport || disableRelativeTimestamps) return formatFullDateNoTime(date);

        const today = new Date();
        const yesterday = new Date();
        const days = getDaysArray("long");
        yesterday.setDate(today.getDate() - 1);

        if (date.toDateString() === today.toDateString()) {
            return this.relativeTimeFormat.format(0, "day"); // Today
        } else if (date.toDateString() === yesterday.toDateString()) {
            return this.relativeTimeFormat.format(-1, "day"); // Yesterday
        } else if (today.getTime() - date.getTime() < 6 * 24 * 60 * 60 * 1000) {
            return days[date.getDay()]; // Sunday-Saturday
        } else {
            return formatFullDateNoTime(date);
        }
    }

    private pickDate = async (inputTimestamp: number | string | Date): Promise<void> => {
        const unixTimestamp = new Date(inputTimestamp).getTime();
        const roomIdForJumpRequest = this.props.roomId;

        try {
            const cli = MatrixClientPeg.safeGet();
            const { event_id: eventId, origin_server_ts: originServerTs } = await cli.timestampToEvent(
                roomIdForJumpRequest,
                unixTimestamp,
                Direction.Forward,
            );
            logger.log(
                `/timestamp_to_event: ` +
                    `found ${eventId} (${originServerTs}) for timestamp=${unixTimestamp} (looking forward)`,
            );

            // Only try to navigate to the room if the user is still viewing the same
            // room. We don't want to jump someone back to a room after a slow request
            // if they've already navigated away to another room.
            const currentRoomId = SdkContextClass.instance.roomViewStore.getRoomId();
            if (currentRoomId === roomIdForJumpRequest) {
                dispatcher.dispatch<ViewRoomPayload>({
                    action: Action.ViewRoom,
                    event_id: eventId,
                    highlighted: true,
                    room_id: roomIdForJumpRequest,
                    metricsTrigger: undefined, // room doesn't change
                });
            } else {
                logger.debug(
                    `No longer navigating to date in room (jump to date) because the user already switched ` +
                        `to another room: currentRoomId=${currentRoomId}, roomIdForJumpRequest=${roomIdForJumpRequest}`,
                );
            }
        } catch (err) {
            logger.error(
                `Error occured while trying to find event in ${roomIdForJumpRequest} ` +
                    `at timestamp=${unixTimestamp}:`,
                err,
            );

            // Only display an error if the user is still viewing the same room. We
            // don't want to worry someone about an error in a room they no longer care
            // about after a slow request if they've already navigated away to another
            // room.
            const currentRoomId = SdkContextClass.instance.roomViewStore.getRoomId();
            if (currentRoomId === roomIdForJumpRequest) {
                let friendlyErrorMessage = "An error occured while trying to find and jump to the given date.";
                let submitDebugLogsContent: JSX.Element = <></>;
                if (err instanceof ConnectionError) {
                    friendlyErrorMessage = _t("room|error_jump_to_date_connection");
                } else if (err instanceof MatrixError) {
                    if (err?.errcode === "M_NOT_FOUND") {
                        friendlyErrorMessage = _t("room|error_jump_to_date_not_found", {
                            dateString: formatFullDateNoDay(new Date(unixTimestamp)),
                        });
                    } else {
                        friendlyErrorMessage = _t("room|error_jump_to_date", {
                            statusCode: err?.httpStatus || _t("room|unknown_status_code_for_timeline_jump"),
                            errorCode: err?.errcode || _t("common|unavailable"),
                        });
                    }
                } else if (err instanceof HTTPError) {
                    friendlyErrorMessage = err.message;
                } else {
                    // We only give the option to submit logs for actual errors, not network problems.
                    submitDebugLogsContent = (
                        <p>
                            {_t(
                                "room|error_jump_to_date_send_logs_prompt",
                                {},
                                {
                                    debugLogsLink: (sub) => (
                                        <AccessibleButton
                                            // This is by default a `<div>` which we
                                            // can't nest within a `<p>` here so update
                                            // this to a be a inline anchor element.
                                            element="a"
                                            kind="link"
                                            onClick={() => this.onBugReport(err instanceof Error ? err : undefined)}
                                            data-testid="jump-to-date-error-submit-debug-logs-button"
                                        >
                                            {sub}
                                        </AccessibleButton>
                                    ),
                                },
                            )}
                        </p>
                    );
                }

                Modal.createDialog(ErrorDialog, {
                    title: _t("room|error_jump_to_date_title"),
                    description: (
                        <div data-testid="jump-to-date-error-content">
                            <p>{friendlyErrorMessage}</p>
                            {submitDebugLogsContent}
                            <details>
                                <summary>{_t("room|error_jump_to_date_details")}</summary>
                                <p>{String(err)}</p>
                            </details>
                        </div>
                    ),
                });
            }
        }
    };

    private onBugReport = (err?: Error): void => {
        Modal.createDialog(BugReportDialog, {
            error: err,
            initialText: "Error occured while using jump to date #jump-to-date",
        });
    };

    private onLastWeekClicked = (): void => {
        const date = new Date();
        date.setDate(date.getDate() - 7);
        this.pickDate(date);
        this.closeMenu();
    };

    private onLastMonthClicked = (): void => {
        const date = new Date();
        // Month numbers are 0 - 11 and `setMonth` handles the negative rollover
        date.setMonth(date.getMonth() - 1, 1);
        this.pickDate(date);
        this.closeMenu();
    };

    private onTheBeginningClicked = (): void => {
        const date = new Date(0);
        this.pickDate(date);
        this.closeMenu();
    };

    private onDatePicked = (dateString: string): void => {
        this.pickDate(dateString);
        this.closeMenu();
    };

    private renderJumpToDateMenu(): React.ReactElement {
        let contextMenu: JSX.Element | undefined;
        if (this.state.contextMenuPosition) {
            const relativeTimeFormat = this.relativeTimeFormat;
            contextMenu = (
                <IconizedContextMenu
                    {...contextMenuBelow(this.state.contextMenuPosition)}
                    onFinished={this.onContextMenuCloseClick}
                >
                    <IconizedContextMenuOptionList first>
                        <IconizedContextMenuOption
                            label={capitalize(relativeTimeFormat.format(-1, "week"))}
                            onClick={this.onLastWeekClicked}
                            data-testid="jump-to-date-last-week"
                        />
                        <IconizedContextMenuOption
                            label={capitalize(relativeTimeFormat.format(-1, "month"))}
                            onClick={this.onLastMonthClicked}
                            data-testid="jump-to-date-last-month"
                        />
                        <IconizedContextMenuOption
                            label={_t("room|jump_to_date_beginning")}
                            onClick={this.onTheBeginningClicked}
                            data-testid="jump-to-date-beginning"
                        />
                    </IconizedContextMenuOptionList>

                    <IconizedContextMenuOptionList>
                        <JumpToDatePicker ts={this.props.ts} onDatePicked={this.onDatePicked} />
                    </IconizedContextMenuOptionList>
                </IconizedContextMenu>
            );
        }

        return (
            <ContextMenuTooltipButton
                className="mx_DateSeparator_jumpToDateMenu mx_DateSeparator_dateContent"
                data-testid="jump-to-date-separator-button"
                onClick={this.onContextMenuOpenClick}
                isExpanded={!!this.state.contextMenuPosition}
                title={_t("room|jump_to_date")}
            >
                <h2 className="mx_DateSeparator_dateHeading" aria-hidden="true">
                    {this.getLabel()}
                </h2>
                <div className="mx_DateSeparator_chevron" />
                {contextMenu}
            </ContextMenuTooltipButton>
        );
    }

    public render(): React.ReactNode {
        const label = this.getLabel();

        let dateHeaderContent: JSX.Element;
        if (this.state.jumpToDateEnabled) {
            dateHeaderContent = this.renderJumpToDateMenu();
        } else {
            dateHeaderContent = (
                <div className="mx_DateSeparator_dateContent">
                    <h2 className="mx_DateSeparator_dateHeading" aria-hidden="true">
                        {label}
                    </h2>
                </div>
            );
        }

        return <TimelineSeparator label={label}>{dateHeaderContent}</TimelineSeparator>;
    }
}
